I am playing with Parma, and Felipe Caicedo has been my starting striker for two seasons. He has played in the Complete Forward role, and although he wasn't natural there, he was about 75% comfortable there. Now, out of the blue, he can't play it at all. Is this normal as he is decreasing in stats?

I am playing with Parma, and Felipe Caicedo has been my starting striker for two seasons. He has played in the Complete Forward role, and although he wasn't natural there, he was about 75% comfortable there. Now, out of the blue, he can't play it at all. Is this normal as he is decreasing in stats?

I'm not sure, but I think how comfortable he is in different roles is determined by the attributes needed to play that specific role.
If his attributes dropped off, so will the roles.

On my current save with Rangers, Toni Martinez has become natural in the "Complete Forward" role even though he's not played in that role the entire season nor has been getting trained to play that role.

It will be because of his physical decline, I wouldn't worry too much for the immediate future. I've forced plenty of players into roles and they have still performed, he has good Finishing/Composure so if you lay the chances on he will take them.

But as time goes on and his decline continues, if you are struggling to break a team down he won't be your man because of his poor OTB and lack of physical stats.